its not button sound bro... it is camera lense sound... after s6 and every phone hase auto focus lense which is freely moving in its camera lense frame. so when u hard try to shake it collide with the frame.. which leads to damage your camera. It was happen with me and change the camera module so avoide hard shake to your mobile.
We apologize for the inconvenience caused. We would suggest you to visit nearby Samsung Service Centre if there is some hardware issue is occurring with your device, so service engineer will examine your device physically. Please find service centre details in the link provided http://www.samsung.com/in/support/servicelocation/ .
